Question

Java中如何改变List里对象的属性值

Answer 1

//实现查询所有项目信息,查出来后把status字段类型转换 0=“已申报”1=“审核中”2=“已审核” public List<Projectinfo listAll() { List<Projectinfo list= projectinfoDao.findAll(); Projectinfo p=list.get(1); p.Status=Integer.parseInt("申报"); //p.setStatus(Integer.parseInt("申报")); for(Projectinfo l:list){ System.out.println(l.getStatus());}return list;}报错了！log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext). log4j:WARN Please initialize the log4j system properly. Hibernate: select projectinf0_.ID as ID0_, projectinf0_.PROJECT_NAME as PROJECT2_0_, projectinf0_.START_DATE as START3_0_, projectinf0_.END_DATE as END4_0_, projectinf0_.STATUS as STATUS0_ from SCOTT.PROJECTINFO projectinf0_ Exception in thread "main" java.lang.NumberFormatException: For input string: "申报" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:447) at java.lang.Integer.parseInt(Integer.java:497) at service.ProjectinfoServiceImpl.listAll(ProjectinfoServiceImpl.java:28) at test.test2.main(test2.java:40)回答： Map map = new HashMap();